<template>
  <el-container class="home_container">
    <el-header>
      <div class="home_avtar">
        <img src="../assets/avatar.jpg" alt/>
        <span>电商管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle_button" @click="toggleCollapse">|||</div>
        <!-- 侧边栏区域 -->
        <el-menu
          background-color="#333744"
          :collapse="isCollapse"
          :collapse-transition="false"
          router
          unique-opened
          text-color="#fff"
          active-text-color="#409BFF"
          :default-active="activePath"
        >
          <!-- 一级菜单 -->
          <el-submenu :index="item.id + ''" v-for="item in menuList" :key="item.id">
            <!-- 以及菜单的模板项 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconsObj[item.id]"></i>
              <span>{{item.authName}}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item
              :index="'/' + subItem.path +''"
              v-for="subItem in item.children"
              :key="subItem.id"
              @click="saveNavState('/'+subItem.path)"
            >
              <template slot="title">
                <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <span>{{subItem.authName}}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <el-main>
        <!-- 路由占位符 -->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data() {
    return {
      menuList: [],
      iconsObj: {
        "125": "iconfont icon-user",
        "103": "iconfont icon-tijikongjian",
        "102": "iconfont icon-shangpin",
        "101": "iconfont icon-danju",
        "145": "iconfont icon-baobiao"
      },
      isCollapse: false,
      //被激活的链接地址
      activePath:''
    };
  },
  created() {
    this.getMenulist();
    this.activePath = window.sessionStorage.getItem('activePath');
  },
  methods: {
    logout() {
      window.sessionStorage.clear();
      this.$router.push("/login");
    },
    //获取所有的侧边导航
    async getMenulist() {
      const { data: res } = await this.$http.get("menus");
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg);
      this.menuList = res.data;
      console.log(res);
    },
    //点击按钮，切换菜单的额直接与展开
    toggleCollapse() {
      this.isCollapse = !this.isCollapse;
    },
    //保存链接的激活状态
    saveNavState(activePath){
      window.sessionStorage.setItem('activePath',activePath);
      this.activePath = activePath;
    }
  }
};
</script>

<style lang="less" scoped>
.home_container {
  height: 100%;
}
.home_avtar{
  margin-left: 10px;
  img{
    width: 50px;
    border-radius: 50%;
    overflow: hidden;
  }
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    > span {
      margin-left: 15px;
    }
  }
}
.el-aside {
  background-color: #333744;
  .el-menu {
    border-right: none;
  }
}
.el-main {
  background-color: #eaedf1;
}
.iconfont {
  margin-right: 10px;
}
.toggle_button {
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>